Ore roasting and oxidizing apparatus.



PATENTED 001*. 2, 1906.

F. G. BUTTERPIELD. ORE ROASTING AND OXIDIZING APPARATUS.

APPLICATION FILED AUG. 24, 1905- 3 SHEETS-SHEET 1.

m m $2. ll L W a W N I r n No. 832,292. PATENTED DOT. 2, 1%6. F. J,BUTTER EIELD. ORE ROASTING AND OXIDIZING APPARATUS.

APPLICATION PILED AUG. 24, 1905.

3 SHEETS-SHBET 2.

N0. 832,292. PATENTED OCT. 2, 1906. F (L BUTTERFIELD. DRE RQASTING ANDOXIDIZING APPARATUS.

AYPLIGATIOH FILED AUG. 24;, 1965.

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FESSEND iT-lfii igii 1 1% if ZDXlDiQfIiNG i Flfili'ifiih KQQJ.Specification cf'Letters Patent. Federated. Get. 2, 12906 Application {H1 August 24, 1905 Seria No. IE-35,557,

To all; whom 21'' Huey cancer-7 Be itlrnewri that l, Fessrmosrr C. BUT-TERFIELD, citizen of the United States, residing Oakland, in the countyof Alameda and State of California, have invented new and usefulImprovements in Ore Roasting and ()Xidizing Apparatus, of which the following e specification;

My invention relates to on upper-ate which is designed for roasting,oxidizing, an

otherwise treiiting valuable ores with s View to rezu'lerijug theextraction of precious and oal'iernieiislmere readily died. I

l 6 consists in the GOITIbiHELEiOD of apparatus whereby heat is appliedto roast the ore and the gaseous metallicproducts 'erising ill BTW fromare afterward condensed.

1 it also comprises details of construction which will be more fullyexplained by ref erenoe, to the accompanying drawings, in Whi-eii--- ore1 is per" i section and elevation showing the furnace and receiving endFi shows the dust-chamber and eoi'idenser, 3 is e transverse n of the reringder; ii is in aged end vievof one i the liningiiles.

1 carryingout my inventio" l employ a vy-revoluble cylinder, A, merino 3.1 u on oeering Wheels or rollers 2 by means of surroui'idingrings orflanges 23, which rest ,II he llers, and any suitable gear or -eehenismthrough wliiieli power is llbtE-(l to slowly revolve the cylinder. rideris suitably constructed. preferan outer metal shel and en inner .ig ofme br; l or file. The hearing or ring 3 is preferably" made in segmentsthe shell, so as to be readily remov- '3 gear or c' euler ll and 'ougli")OWGF. is trens'mi 35. to propel the sylmy be similarly constructed.The the oylinde'r are suitably ed "o; having central inlet. end(iisclisrge openirigs. These ends have openings made in. seem around theouter 'porti-zei, as at o. v

end these openings .e to feed and diseiiierge the ore re from "liiider.se openings are controlled by ites e be slidably or otherwise i. tied tobe opened for the purpose of feeding or discharging and eloseole to makea tiglii casing tile roaming-chamber is ch e ed end in W are also we" inthe observation of the interior of the roastingchem ber may be made iii.any time. A 3}, rometer is attached to the disclierge end, t .211; theworking temperature may be ki'iowii t any and all times.

in order to conveniently apply lie-zit to the roastingrhamber, l haveshown a combustion-chamber "i, which. may be of any suitable shape andmounted upon legs 8 with beering-wlieels 9, which are ad opted. to morei'upon a track, as at 10, so that the siiruciiire 7 may be broug it;close up i; the end of the roes'ting-- chamber or removed therefrom. Theinlet end. of the roesting-chamber megs interior of the heating ap mmtis 7 larly lined with lire-tile, and the openings ii the two partscoincide when the structure '4 is moved up close against the end of thesleeve 1 1'1, so that there will be e suliiciem tight joint between thetwo [my eiteole form of iourtn er, preferably for the combustioii ofoil, may be connected with the COI'UbUQ- tion-cln'miber '7 lxl'irouglien opening in the outerend, as shown et- In conneebioii with this heater1 have ShOHn one or more air-admission pipes; as at "i 3. Such pipe orpipes open through the side oi the healer 7 and serve 10 admit anydesire-fl quantity of air to pron-note more perfect combustion of thefuel and also to furnish sufficient oxygen for the purpose of rapidlyoxidizing the ore in the X'OfiSLll1g-Qllz1D1bQIl Tilefiir-iiilnllsslOffl pipe is furnished. with an exterior gate 14, byWliieh the proportion of air admitted can be comm-oiled. It will beseen. that by this con struetion the heater or combustionreharmberportion of the zipper-mus may be reedily movedbeek upon its tree-ks soas to leave a clear opening mm the interior of the roest- I big-chamberwhen required and moved back for use. Combustion thus proeeedsso for inv are discharged through the central end open-- ing of theroasting-chamber, which is opposite to the furnace, and pass out througha tubular passage 15, which connects with this head of the chamber. Thedust-chamber 17 receives the fumes and gases which are discharged fromthe roasting-chamber, and this dust-chamber is constructed withalternate hanging walls from top and other walls or partitions arisingfrom the bottom, leaving spaces alternately below and above these walls,so that the fumes will follow a sinuous course down and up, and thelower part of the chamber may thus receive and retain the dust. Beyond.the dust-chamber is a second chamber, into which the fumes and residuefrom the dust-chamber are drawn. This chamber has suitable passagesthrough which the vapors are drawn by an exhaust-fan. Such gates andpartitions are employed. in this connection as may be desired. to givethe proper direction to the passing gases from the dust-chamber. Thegases orfumes may pass into this second chamber, which has partitionsand baffle-plates to form sinuous passages, and the outer side of thechamber is finally connected by a discharge-passage 1 8 with asuction-fan, which insures a draft sufficient to cause the ases to beproperly passed through the furnace and chamber. Spraypipes 20 dischargewater into this chamber to condense and arrest dust or gases which it isdesirable to at this point.

After the ore is sufliciently roasted the peesages 5 5 at opposite endsof the roastingchamber may be opened and by continued revolution of thechamber the greater portion I of the ore will be discharged throughthese openings. After nearly the whole of the ore has been discharged itis possible to finish the discharge by means of rakes or hoes introducedfrom either end through these openings, and the furnace will thus beprepared for a new charge.

Having thus described my invention, what I claim, and desire to secureby Letters latent, is

1. The combination with a revoluble oreroasting shell having meanswhereby ore may be admitted thereto, of a combustion-chan1- ber separatefrom the shell and movable toceases ward and from the inlet end thereofsaid chamber having an opening in one end for the admission of agaseousfluid and having an air-supply pipe fixed to and movable in unison witit.

2. The combination with a revoluble orethereto, of a whee edcombustion-chamber separate from the shell and movable toward and fromthe inlet end threof'andadapted v to abut endwise against said inlet,said chamber having an opening in one end substantially in line with theinlet of the shell, an oilburner adapted to discharge its fluid fuelthrough said opening, and an air-su ply pipe fixed to the chamber andmovable t erewith, and adapted to discharge thereinto.

3. The combination with a revoluble ore-' 6' roasting shell havin meansfor admitting ore ling said openings, means for revolving said 4 shell,settling and condensing chambers with which the central tube at thedischarge end is connected, and a combustion-chamber movable to and fromthe inlet-tube of the shellto provide a fluid-fuel supply.

5. In a furnace, a horizontally-revoluble shell having heads with alinedopenings around the peripheries of the heads, for the admission of oreat one end, and the discharge of the solid residue at the opposite end,ies

slidably controlling said openings, reduced- ZOO tubular,centrally-disposed ends projecting from the heads, a combustion-chambermov able to and from the inlet of the shell and provided with afluid-fuel supply, and settling and condensing chambers with which thetubular extension at the opposite end of the furnace is connected todeliver the separated I m vapors and gases.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FESSENDEN G. BUTTERFIELD.

Witnesses:

HENRY P. TnIcoU, S. H. NOURSE.

